In addition, these headphones offer noise canceling, with a closed dynamic supra-aural design, and standard Neodymium magnets. The series is comprised of the ZX100, ZX300, ZX500, and ZX700 models, with a range of drivers and audio frequencies available. The ZX500, being in the middle range of these options, offers 40mm dome type driver units with OFC copper voice coils, multi-layer film PET diaphragms, and a frequency response of 8-25,000Hz, for increased bass-response performance, and more precise mid and treble tones as well. These headphones also have a high power capacity of up to 1,500mW, and adjustable crush ear pads to supply a crisper, clearer sound.